Timing Milk-based PAG Pregnancy Tests

Identifying open cows in a timely manner is essential for successful reproductive management of the dairy herd.  Fortunately, the options for doing so have been expanding.  In addition to palpation, ultrasound and blood testing, milk testing is now being offered through DHIA testing centers. In the April 2015 Wisconsin Agriculturist article Timing milk-based PAG pregnancy […]

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Are Blood Pregnancy Tests or Milk Pregnancy Tests More Accurate?

In the February 2015 e-newsletter,  the Dairy Cattle Reproduction Council shares that researchers at the University of Wisconsin recently conducted one of the first studies to directly compare factors associated with blood and milk pregnancy-associated glycoproteins (PAGs) levels during the first trimester of pregnancy in Holstein cows. Their findings will be published in an upcoming […]

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The Association Between Occurrence and Severity of Subclinical and Clinical Mastitis on Pregnancies per Artificial Insemination at First Service of Holstein Cows

Recently, UW-Extension Dairy Reproductive Specialist Paul Fricke and UW-Milk Quality Specialist Pam Ruegg conducted a study on the association between occurrence and severity of subclinical and clinical mastitis on pregnancies per artificial insemination at first service of Holstein cows.  To learn more about the study, please visit the Journal of Dairy Science abstract. For more […]

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Milk vs Blood-Which is Best for PAG Prediction?

Identification of nonpregnant dairy cows early after AI improves reproductive efficiency and pregnancy rate by decreasing the interval between AI services thereby increasing the AI service rate. Thus, new technologies to identify nonpregnant dairy cows and heifers early after AI may play a key role in management strategies to improve reproductive efficiency and profitability on […]

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New UW-Extension Dairy Cattle Reproduction Website

Achieving reproductive success on the dairy is an ongoing challenge.  UW-Extension Dairy Cattle Reproductive Specialist Paul Fricke provides extension programming to improve 21-day pregnancy rates in dairy herds by applying knowledge gained through scientific research to develop practical management strategies and assess new reproductive technologies. As part of his extension outreach, Dr. Fricke has developed […]

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